Problems with STAGE - actionscript-3

Question

I am pretty new to as3 programming. This forum helped me already a lot, but now I have a problem where I don't know how to get on. So this is my first Post on stack overflow.com.
I need StageWebView for displaying a PDF-document. After several hours, I was successful. I created the code in a new blank document and tested it step by step.
This is my code:
import flash.display.MovieClip;
import flash.media.StageWebView;
import flash.geom.Rectangle;
import flash.filesystem.File;
import flash.display.Sprite;
import flash.display.Stage;
public function StageWebViewExample(pdfdoc:String, xpos:Number, ypos:Number, breite:Number, hoehe:Number)
{
var webView:StageWebView = new StageWebView();
webView.stage = this.stage; //PROBLEM LINE
webView.viewPort = new Rectangle (xpos, ypos, breite, hoehe);
var file:String = pdfdoc;
var pdf:File = File.applicationDirectory.resolvePath(file);
webView.loadURL(pdf.nativePath);
}
StageWebViewExample("test.pdf", 200, 200, 600, 1200);
After testing, I copied the code in my existing flash-document. (The code in a several as-File and the "calling" (StageWebViewExample("....) in the existing flash-document...)
But now the code does't work anymore and there are the following Errors:
- 1119 Access of possibly undefined property stage...
- 1059 Property is read-only.
--> Both Errors referring to the same line I marked in the Code.
Has anyone an idea why it don't work?
I would really appreciate a good hint!

Answer 1

Answer for question is your actions ;) You moved code from the Document Class, in another one, that don't have access to the stage as instance property. I mean this.stage.
Pass Stage also to the method StageWebViewExample, function signature will look like:
public function stageWebViewExample(stage: Stage, pdfdoc:String, xpos:Number, ypos:Number, breite:Number, hoehe:Number):void {
var webView:StageWebView = new StageWebView();
webView.stage = stage;
webView.viewPort = new Rectangle (xpos, ypos, breite, hoehe);
var file:String = pdfdoc;
var pdf:File = File.applicationDirectory.resolvePath(file);
webView.loadURL(pdf.nativePath);
}
Working AIR example:
package {
import flash.display.Sprite;
import flash.display.Stage;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.geom.Rectangle;
import flash.media.StageWebView;
public class StackOverflow extends Sprite {
public function StackOverflow() {
addEventListener(Event.ADDED_TO_STAGE, onAdded);
}
private function onAdded(e:Event):void {
removeEventListener(Event.ADDED_TO_STAGE, onAdded);
stage.align = StageAlign.TOP_LEFT;
stage.scaleMode = StageScaleMode.NO_SCALE;
start();
}
private function start():void {
showWebViewAt(this.stage, "http://www.iab.net/media/file/VASTv3.0.pdf", new Rectangle(0, 0, stage.stageWidth * 0.5, stage.stageHeight));
}
private function showWebViewAt(stage:Stage, path:String, frame:Rectangle):void {
var webView:StageWebView = new StageWebView();
webView.stage = stage;
webView.viewPort = frame;
webView.loadURL(path);
}
}
}